John Ferrell wrote in
:

My SGC-237 is hard to mess up. Where ever you attach the wire to the
tuner is the beginning of the antenna. The coax attach will simply be
a matched line to the transceiver. I would be inclined to simply
attach the coax to the inverted V as you outlined and use it.


John,

Any conductors or transmission lines carrying a net current (or common
mode current) will contribute to radiation. If your meaning of "antenna"
is something that contributes to radiation, then the feedline on both
sides of the ATU might be part of the "antenna" no matter what you might
declare.

If Ed connects parallel line from the centre of the dipole to the hot and
common terminals of the ATU, there is likely to be common mode current on
the parallel line adjacent to the ATU. If the only connection on the tx
side of the ATU is the coax, then it will also have a common mode current
adjacent to the ATU and near enough to equal to the common mode current
on the other side of the ATU.

That is not to say it won't work. People regularly build antennas with
radiating feedlines, some (mainly commercial interests) even call that
out as a significant advantage.

Nevertheless, there are downsides and some measures to minimise the
common mode current on the feedline may be warranted... or even
necessitated down the track.

Ed has been deliberating over a solution to this problem for a long time.
It has been discussed to some depth!

Owen